but we live in a technologically fluent culture. whether or not everyone shares in that fluency. and among those who know, we have ways, on paper, to deflect asteroids. if we find them early enough before they come in. none of those plans are funded by any agency anywhere in the world. so that's a whole other cultural political challenge that would need to be overcome. for the moment, all we're doing is the meager funds that hasa-- nasa has to do so combined with some other funds around the world is to find the asteroids and track them. now this one that hit russia, yeah it tore up the town a bit but it's not disrupting civilization. if you get asteroids about a kill meet never size, those are large-- kilometre in size those are large enough to disrupt transportation, communication, the food chains and that can be really bad day on earth. and so we set up a criterion to find all kilometer class asteroids whose orbit crossed earth and we did a really good job at it. we said okay, let's go a little smaller. how about, how about 100 meter asteroids. let's map them. now we know when